<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤进度条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏 -->
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="this.addprice"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="this.addweight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="this.addnumber" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="{
                  expandTrigger: 'hover',
                  ...cateProps,
                }"
                v-model="addForm.goods_cat"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              v-for="item in manyTableData"
              :label="item.attr_name"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
           
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>          
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="addBtn" @click="addGood">
              添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- //图片预览 -->
    <el-dialog title="图片预览 " :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>
      
<script>
import _ from 'lodash'
export default {
  name: 'addGoods',
  data() {
    return {
      //步骤条进度
      activeIndex: '0',
      //添加商品的表单数据集
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        pics: [], //图片路径的数组
        goods_introduce: '', //介绍
        attrs: [], //合并动态参数和静态属性
      },
      //数据验证
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
          {
            pattern: /^\d+(\.(?!.*0$)\d{1,2})?$/,
            message: '商品价格不能小于零,且小数点后两位即可',
            trigger: 'blur',
          },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
          {
            pattern: /^\d+(\.(?!.*0$)\d{1,2})?$/,
            message: '商品重量不能小于零，且最多保留小数后两位',
            trigger: 'blur',
          },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
          {
            pattern: /^[1-9]\d*$/,
            message: '商品数量应为正整数',
            trigger: 'blur',
          },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      //图片上传的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      previewPath: '', //预览图片地址
      previewVisible: false, //预览图片
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      } else {
        this.catelist = res.data
      }
    },
    //选择器选项变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //离开当前tab页
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    //tab栏点击事件
    async tabClicked() {
      //点击第二栏tab动态参数
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        } else {
          res.data.forEach((item) => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data
        }
      }
      //点击第三栏tab静态属性
      else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        } else {
          this.onlyTableData = res.data
        }
      }
    },
    //图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //移除图片
    handleRemove(file) {
      //获取图片路径
      const filePath = file.response.data.tmp_path
      //查找addform中图片位置
      const i = this.addForm.pics.findIndex((x) => {
        x.pic = filePath
      })
      //删除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    //图片上传成功
    handleSuccess(res) {
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      } else {
        //将图片路径拼接，添加到addform
        const picInfo = { pic: res.data.tmp_path }
        this.addForm.pics.push(picInfo)
        this.$message.success(res.meta.msg)
      }
    },
    //添加商品
    addGood() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)

        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        } else {
          this.$message.success(res.meta.msg)
          this.$router.push('/goods')
        }
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
    addprice(){
      return this.addForm.goods_price===0?' ':this.addForm.goods_price
    },
    addweight(){
     return this.addForm.goods_weight===0?' ':this.addForm.goods_weight
    },
     addnumber(){
     return this.addForm.goods_number===0?' ':this.addForm.goods_number
    }
  },
}
</script>
      
<style lang="less" scoped>
.el-input {
  width: 85%;
}
.el-form,
.el-steps {
  margin-left: 100px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 80%;
}
.addBtn {
  margin-top: 15px;
  float: right;
  margin-right: 15%;
}

</style>